/* ========================================
   SEQUENZO LANDING PAGE - MODERN DESIGN
   ======================================== */

:root {
    --primary: #00D4FF;
    --primary-dark: #00a8cc;
    --primary-light: #e6faff;
    --secondary: #1A2E3D;
    --secondary-light: #2a3f50;
    --accent: #6366f1;
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    --background: #0a0f14;
    --surface: #111820;
    --surface-light: #1a2330;
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: rgba(255, 255, 255, 0.1);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(0, 212, 255, 0.15);
    --radius: 12px;
    --radius-sm: 8px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   NAVIGATION
   ======================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 15, 20, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
}

.nav-brand i {
    font-size: 28px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--text-primary);
}

.btn-login {
    background: var(--surface-light);
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    transition: all 0.3s !important;
}

.btn-login:hover {
    background: var(--primary) !important;
    color: var(--background) !important;
    border-color: var(--primary) !important;
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 24px;
    cursor: pointer;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--surface);
    padding: 20px;
    flex-direction: column;
    gap: 16px;
    border-bottom: 1px solid var(--border);
}

.mobile-menu a {
    color: var(--text-primary);
    text-decoration: none;
    padding: 12px;
    border-radius: var(--radius-sm);
    transition: background 0.3s;
}

.mobile-menu a:hover {
    background: var(--surface-light);
}

.mobile-menu.active {
    display: flex;
}

/* ========================================
   HERO SECTION
   ======================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-gradient {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0, 212, 255, 0.15), transparent),
        radial-gradient(ellipse 60% 40% at 80% 80%, rgba(99, 102, 241, 0.1), transparent);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero h1 {
    font-size: clamp(36px, 6vw, 64px);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(16px, 2vw, 20px);
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.btn-primary, .btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: var(--radius);
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--background);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 60px rgba(0, 212, 255, 0.3);
}

.btn-secondary {
    background: var(--surface-light);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--secondary-light);
    border-color: var(--primary);
}

.hero-stats {
    display: flex;
    gap: 40px;
    justify-content: center;
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
}

/* ========================================
   FEATURES SECTION
   ======================================== */

.features {
    padding: 100px 0;
    background: var(--surface);
}

.section-title {
    text-align: center;
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 700;
    margin-bottom: 16px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--surface-light);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    transition: all 0.3s;
}

.feature-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon i {
    font-size: 24px;
    color: var(--background);
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 15px;
}

/* ========================================
   DOWNLOAD / PRICING SECTION
   ======================================== */

.download {
    padding: 100px 0;
    background: var(--background);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    max-width: 900px;
    margin: 0 auto 60px;
}

.pricing-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px 32px;
    position: relative;
    transition: all 0.3s;
}

.pricing-card.featured {
    border-color: var(--primary);
    background: linear-gradient(180deg, var(--surface) 0%, var(--secondary) 100%);
    transform: scale(1.05);
}

.pricing-card:hover {
    border-color: var(--primary-dark);
}

.badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: var(--background);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pricing-header {
    text-align: center;
    margin-bottom: 32px;
}

.pricing-header h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
}

.price {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

.pricing-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

.pricing-features {
    list-style: none;
    margin-bottom: 32px;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features li i {
    font-size: 14px;
}

.pricing-features li i.fa-check {
    color: var(--success);
}

.pricing-features li i.fa-times {
    color: var(--error);
}

.pricing-features li.disabled {
    color: var(--text-muted);
}

.btn-download {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 16px;
    background: var(--surface-light);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    transition: all 0.3s;
    border: 1px solid var(--border);
}

.btn-download:hover {
    background: var(--primary);
    color: var(--background);
    border-color: var(--primary);
}

.download-info {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.download-meta {
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
    color: var(--text-secondary);
    font-size: 14px;
}

.download-meta span {
    display: flex;
    align-items: center;
    gap: 8px;
}

.download-note {
    color: var(--text-muted);
    font-size: 13px;
    line-height: 1.8;
}

/* ========================================
   LOGIN PAGE STYLES
   ======================================== */

/* Auth Tabs */
.auth-tabs {
    display: flex;
    gap: 0;
    margin: -48px -40px 0;
    border-bottom: 1px solid var(--border);
}

.auth-tab {
    flex: 1;
    padding: 20px;
    background: var(--surface-light);
    border: none;
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.auth-tab:first-child {
    border-top-left-radius: var(--radius);
}

.auth-tab:last-child {
    border-top-right-radius: var(--radius);
}

.auth-tab:hover {
    background: var(--secondary-light);
    color: var(--text-primary);
}

.auth-tab.active {
    background: var(--surface);
    color: var(--primary);
    border-bottom: 2px solid var(--primary);
}

/* Free License Info */
.free-license-info {
    margin-top: 24px;
    padding: 16px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(99, 102, 241, 0.1) 100%);
    border: 1px solid var(--primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: var(--text-secondary);
}

.free-license-info i {
    color: var(--primary);
    font-size: 20px;
}

.free-license-info strong {
    color: var(--primary);
}

/* Success Alert */
.alert-success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
}

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 24px 40px;
    background: 
        radial-gradient(ellipse 60% 40% at 20% 40%, rgba(0, 212, 255, 0.1), transparent),
        radial-gradient(ellipse 50% 30% at 80% 60%, rgba(99, 102, 241, 0.1), transparent),
        var(--background);
}

.login-container {
    width: 100%;
    max-width: 420px;
}

.login-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 48px 40px;
    box-shadow: var(--shadow-lg);
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-header i {
    font-size: 48px;
    color: var(--primary);
    margin-bottom: 16px;
}

.login-header h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 15px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-input {
    width: 100%;
    padding: 14px 16px;
    background: var(--surface-light);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 15px;
    transition: all 0.3s;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--secondary);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.btn-submit {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--background);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 8px;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
}

.btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 14px;
    display: none;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--error);
    color: var(--error);
}

.alert-success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
}

.alert.show {
    display: block;
}

.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 8px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.login-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 14px;
    color: var(--text-secondary);
}

.login-footer a {
    color: var(--primary);
    text-decoration: none;
}

.login-footer a:hover {
    text-decoration: underline;
}

.user-info {
    text-align: center;
}

.user-info h2 {
    font-size: 24px;
    margin-bottom: 8px;
}

.user-info p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.license-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--surface-light);
    border-radius: 20px;
    font-size: 14px;
    margin-bottom: 24px;
}

.license-badge.free {
    border: 1px solid var(--text-muted);
}

.license-badge.basic {
    border: 1px solid var(--success);
    color: var(--success);
}

.license-badge.admin {
    border: 1px solid var(--primary);
    color: var(--primary);
}

/* ========================================
   FOOTER
   ======================================== */

.footer {
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
    gap: 24px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-brand i {
    font-size: 32px;
    color: var(--primary);
}

.footer-brand span {
    font-size: 24px;
    font-weight: 700;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 14px;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: var(--primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 14px;
}

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-toggle {
        display: block;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-stats {
        gap: 24px;
    }
    
    .features, .download {
        padding: 60px 0;
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .login-card {
        padding: 32px 24px;
    }
    
    .auth-tabs {
        margin: -32px -24px 0;
    }
    
    .auth-tab {
        padding: 16px 12px;
        font-size: 14px;
    }
    
    .auth-tab i {
        display: none;
    }
}